INBDE (Integrated National Board Dental Examination) Practice Exam

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Which of the following are eye abductors?

  1. Superior oblique, inferior oblique, and lateral rectus

  2. Superior rectus, inferior rectus, and medial rectus

  3. Superior oblique, inferior rectus, and lateral rectus

  4. Superior rectus, inferior oblique, and medial rectus

The correct answer is: Superior oblique, inferior oblique, and lateral rectus

The correct answer is A. The eye abductors are the muscles responsible for moving the eye away from the midline (laterally). The superior oblique, inferior oblique, and lateral rectus muscles are the primary muscles that are involved in this action. Option B consists of the superior rectus, inferior rectus, and medial rectus muscles, which are responsible for other movements of the eye and not abduction. Option C includes the superior oblique and lateral rectus, which are eye abductors, but the inferior rectus is not involved in abduction. Option D includes the superior rectus and medial rectus, which are not primary abductors of the eye, and the inferior oblique, which is involved in elevation and extorsion of the eye but not abduction.

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